Does the asthenosphere rise close to the surface beneath mid-ocean ridges?
Midocean ridges are areas where continents broke apart. Midocean ridges are closest to the landmasses in younger oceans. One example where a midocean ridge intersected a landmass is the Arabian sea, which was formed by the pulling apart of the Arabian Peninsula and Africa.
GPS = global positioning device
Mid-ocean ridges transfer energy from the mantle/asthenosphere/lithosphere to the surface. The energy is from the deep Earth.
At transform faults or transform zones.
where it always has been, at the midocean ridges.
At midocean ridges. At underocianic slip faults.
midocean ridges alternating bands of different magnetic fields appearing nearly symmetrically on opposite sides of midocean ridges deep sea trenches etc.
The Navy found them by accident while doing sonar surveys (worrying about Russian subs).
One of the midocean ridges is, but others are in other oceans, seas, and bays.
Abyssal plains cover about 50% of the surface area on Earth and usually positioned between continents and midocean ridges. They are typically at least 3000m deep and represent some of the flatest, smoothest, and least explored landscapes on Earth.
No, the red sea sea is a spreading center. One of the midocean ridges runs up its center.
Older, as it moves away from the mid-ocean ridge the sediment gets thicker and older
Sea floor Spreading! -Lucy laboy Thanks that really helped alot.
The surface on mercury has ridges, volcanoes,and cliffs The surface on mercury has ridges, volcanoes,and cliffs
We can't yet be certain, but the current best guess is that it is predominantly covered with ice. In fact, one of the interesting theories concerning Europa is that the ridges that we can see on the surface were caused by the ice cracking, and the liquid (water?) beneath boiling into space and then refreezing, and then forming pressure ridges when the ice sheets come back together.
The brain has a convoluted shape; the ridges are convolutions.
(1)midocean spreading ridges, (2) subduction zones, and (3) transform faults. Normal fault, Reverse fault, and strike-slip fault
Because it is filled from the asthenosphere.
The boundary between the asthenosphere and the lithosphere is normally below the Moho (which marks the boundary between the crust and the mantle). The exception to this is below mid-ocean ridges where the moho and the lithosphere / asthenosphere boundary are at the same depth.
The midocean ridges are the spreading centers where the plates are moving apart. The seamounts are extinct volcanos produced as the plate passed over a mantle hotspot.
Magma rises to the surface at the ridges because the ridges is where the plates are moving away from each other. When they pull away, they make an area where there is no crust just magma.
The ridges on the surface of the brain are called gyri. And the valleys are called sulci.
Oceanic divergent plate boundaries. Oceanic ridges and oceanic trenches. The ridges are are zones where oceanic crust is emerging to the surface and is the source of sea floor spreading, and oceanic trenches form near continental margins where the sea floor is subducted beneath the continent.
Surface ridges are called convolutions or gyri.
valleys,craters,even ridges on the surface!!
greater surface area
This question should read, "What causes a person to be born with ridges on the biting surface of their front teeth?" Does this occur in any particular race of people?
Magma, from decompression melting of mantle rock, rises to the surface at divergent plate boundaries, such as the mid-ocean ridges.
Mid-ocean ridges are the birthplace of oceanic crust. Trenches represent the destruction and burial of oceanic crust. They are at opposite ends of the Earth's convection currents that move through the asthenosphere.
Two separate oceanic lithospheric plates are moving away from each other. As they separate, buoyant mantle material from the asthenosphere rises to fill the void. This material, which is extremely hot, but solid, and is under tremendous pressure, is decompressed as it rises, causing it to melt. When it rises to a point at or near the surface, this melt solidifies into new oceanic crust. The buoyancy of this hot new crust, coupled with its… Read More
New basaltic oceanic crust is being created at the mid-oceanic ridges by material from the asthenosphere.
We cannot be certain (yet!) but current theories speculate that the moon Europa may be covered with ice, and that beneath the ice there might be oceans. There do appear to be ridges in the surface, which might be caused by cracks forming in the ice and then the liquid water beneath freezing as the ice sheets come back together.
Mid Ocean Ridges (MOR's). Convection in the asthenosphere causes the plates to pull apart, and new molten earth from the asthenosphere fills the gaps. It occurs deep in the center of the oceans at several places.
"as the plates pull apart, magma moves to the surface, building ridges"
Mid Ocean Ridges
Magma / lava.
Yes, it also has volcanoes and ridges. (:
It is one of the 4 components of the mammalian tooth and is to be found just beneath the hard enamel outer layer or in ridges between ridges of hard enamel. Being softer than the enamel, in herbivores (like the elephant) the dentine wears away faster ensuring that the roughness of the tooth surface is maintained as the tooth itself wears away. In omnivores and carnivores, it mechanically supports the enamel surface and protects the… Read More
One of the natural satellites of Jupiter, Europa, has double ridges all over the surface. The cause of this is because the surface of Europa is ice and the planet turns from oval to circle. A squishing kind of thing. That causes the ice to crack and the water beneath comes up and freezes because the temperature is very very cold. This repeats over and over and that causes the double ridges on its surface… Read More
Midocean ridges are formed by currents of magma rising up from the mantle; volcanic eruptions create new basaltic ocean floor, that then spreads away laterally from the ridge. Thus the midocean ridges contain the newest crust formed on the planet. Where denser ocean lithosphere converges with less-dense continental lithosphere, the oceanic plate slides under the continental plate in a process called subduction. Magma produced by this subduction rises to form volcanoes and igneous intrusions. Cited… Read More
The Mohorovicic discontinuity, usually referred to as the Moho, is the boundary between the Earth's crust and the mantle. The Moho serves to separate both oceanic crust and continental crust from underlying mantle. The Moho mostly lies entirely within the lithosphere; only beneath mid-ocean ridges does the Moho also define the lithosphere-asthenosphere boundary. The Mohorovicic discontinuity was first identified in 1909 by Andrija Mohorovicic, a Croatian seismologist, when he observed the abrupt increase in the… Read More
one of the series of ridges that moves across the surface of a liquid..
Ridges, rilles, craters and regoliths
No. Neptune is a gas planet, meaning it has no solid surface.
Epidermal ridges are downward projections of the epidermis into the dermis between the dermal papillae. They also increase the friction and the surface area of the dermis.